Core.



G. L. MATHER. cons. APPLICATION FILED OUT. 18, 1912.

I 1,097,037, Patented May 19, 1914.

GEORGE nown'nnmernnn, or .exnon, 01110.

To all whom it may. concern known that I, GEORGE Low LL Ma man, a citizen of the United States, re

"sidin at Akron, in the. county of Summit tate of Ohio,- have invented new. and .usefu llmprovements in Cores, of which the =followingis a specification.

' lapsible core which may be quickly 'asse1jn This invention relates toimprovements inv collapsible cores for manufacturing the 10.

outer-shoes of double-tube pneumatic tires, and the object therepf is-tc provide a colbled or collapsed, the invention contemplat-i mg the provision ofa plurality ofsegments,

which,, when united,- will form. an annular "core-body for imparting to the interior of i thetirershod'durlng themanufa'cture thereof, the proper shape to receive the inner 111- flatable tube, the invention more particularly residing in the means whereby the various- --.s egments constituting the body portion of the core,- are temporarily held m their ex? pended or open position.

Ilhe primer 4 ob ect of the invention is to so-, construct t e device that one of the segment-shaped ,members constitutes a wedge? shaped key, the inward removal of wh1ch permits the ends of the twoadjacent segments which normally abut against the key to be swung inwardly toward-each other, the- V opposite ends of which are hinged to opposite eildsof a fourth segment to thereby per- .mit the core. to be collapsible to permit its removal-from the interiorof a tire-shoe after the removal of the initial key member.

" The invention vfurther and more particularl contemplates providing the inner faces of .t e initial key member and the two adjacent hinged segments with inclined inner faces, and the two hinged segments are provided with shoulders constituting abutments for the ends'of an approximately sem1-.c1r-' cularlyrformed locking element which is in the form of a trapezium in cross section,

with the inclined face of the locking member opposing the inclined faces of the key member and the two hinged members, so. that when forced laterally into positlon the locking member holds the assembled members of the core in open position and 1s 1t;

' self held in position by means to be more specifically described later.

With the foregoing and other objects in view, the invention consists in the novel con-.- strilction, combinationand arrangement of parts constituting the nventlon :to be heremanufactured thereon. j shaped members are designated in the drawcom.

' inafter specificallydescribed and illustrat ed 1n the'accompanymg' drawings which'forma part hereof wherein is shown the preferred embodlment of the invention, but it is'to be understood that changes, variations and mod fications, can be resorted. to which come w1th1n the scope of the, claims hereunto appended u In the drawings 'inj'which similar. refer ence numerals indicate like parts in the dif- Specification of Letters Patent. Patented May 19, 1914:. I Application filed October. s,- 1912. Serial No. 726,520. I a

tigentfigures, Figure 1, is a plan viewof a rmg core embodying this-invention; Fig. 2, 1s a view slmilar to Fig.1 with the initial key removed and with the hinged members moved inwardly toward each otherso that the core is in its collapsed conditionready for removal from a tire shoe; and, Figs.- 3 4 and 5, are transverse sectional views on 111188 X, Y, -Z, of Fig. 1, respectively.-

The ring core is constructed of a plurality of segmentshaped members, whichwhen asconstitute an a-nnulus the outer face of which 1s adapted to impart the desired configura- :Ysembled together in their expanded or open j posltion as hereinafter .more fully described,

tion to the inner surface of atir'e-shoe to be These segment ings by the reference numerals 1, 2, 3 and .4. The segment-shaped members are preferably coredor made hollow to reduce the a smooth surface, sothat'when the-segments are assembled with their ends in abutting rether provided with an inwardly-extending flange 5.

The joints of the segment-shaped members 2, 3 and 4-are radial to the axis. of the core 'while the lines of severance or joints 6 between the key member 1 and the abutting members 2 and 3 are at an angle with respect to the radii of the core and so inclined iweight of the entire core and the ends of ea'chsegment are preferably closed to present .lationthey form a complete annulus. Each of the segment-shaped members is furas to make the member. 1 practically wedge- I shape. .At the ends of the flange 5 of the member 4 are inwardly extending ears 7- Y and the ends of the'members'2 and 3 which abut against the member4 are also provided with ears 8 complemental to the ears 7, both of themembers of each pair of cars being apertur'ed to receive pivot. bolts 9 for hingare fashioned to abu gainst of the key member 1. The flanges 5 of the members 2 and 3 are cut away at 10 to form shoulders which constitute abutments for a purpose to be later described. The inner faces of the members 1, 2 and 8 are transversely inclined as shown at 11 in Fig. 5. The members 1, 2 and 3 are also provided with approximately radial apertures, preferably frusto-conically-formed for a pur pose to be later described. In order to hold the parts in assembled relation in their expanded position a locking member 12 is employed which embodies an approximately semi-circularly-form-ed member preferably in the form ofa trapezium in cross-section with its outer face inclined and adapted to engage the inclined faces of the member 1, 2 and 3. The member 12 is also provided with a plurality of apertures adapted to register with the frustoconically-form'ed radial apertures in the members 1,2 and 3, p In setting up a core constructed in accordance with this invention, the parts are assembled with the key or wedge-shaped member 1 positioned between the free ends of the members 2 and 3v and the locking member 12 is forced laterally against their inner inclined faces and with its ends positioned against the shoulders 10. When the member 12'is forced into position a'plurality of tapered pins 13 are inserted in the apertures in the members 1, 2, 3 and 12 which hold the locking member from lateral .shifting. When thus set-up the core is ready for use and after a tire has been vulcanized thereon the pins 13 are removed by drawing them inwardly toward the axial line of the core after which the locking member 12 is shifted laterally sufiicientlyto permit its complete removal. After this operation the key member l is drawn inwardly toward the center of the core and bodily removed, then' the free ends of the members 2 and 3 are swung toward each other into the position shown in Fig. 2 after which the collapsible core is readily removed from the interior of a tireshoe.

I claim: i

1. In a collapsible core for the manufacture of tire-shoes, the combination of a series of segmental-shaped sections adapted to be assembled into a circular-core, the ends of-the sections abutting against each other.

and formed with inwardly-extending flanges, two of said sections hinged to opposite ends of a third section, the free ends ofsaid hinged sections having faces adapted to form a wedge-shaped space between them, a wedge-shaped key member adapted to be temporarily inserted between said ends, the inner faces of said key member and said hinged members being transversely inclined, and an approximately semi -circularlyformed transversely shiftable locking member hav ng an outer inclined face adapted to' be inserted within 'said core with itsinclined face 'engagin the inclined faces of said key member an said hinged members and arranged when shifted laterally against the innerfaces of said members totemporarily holdthem in their open or. expanded position.

. '2. In a collapsible core for the manufacture of tire-shoes, the combination of a series of segmental-shaped sections adapted to be assembled into a circular core, theends of the sections abutting against/each other and,

formed with inwardly-extending flanges,two of said sections hinged to opposite ends of a third section, the free ends of said hinged sections having faces adapted to form a wedge-shaped space between them, said sections further provided with recesses, a wedge-shaped key-member adapted to be temporarily inserted between the ends of said hinged sections, said key member pro vided with a recess, the inner faces of said My member and said hinged member. being inclined, and an approximately semi-circularly-formed' locking member having an outer inclined face adapted to be inserted within said core with its inclined face-engaging the inclined faces of, said key member and said hinged member for temporarily holding them in their open or expanded position, said locking member provided w apertures registering with said recess, and

pins arranged to be passed through said apertures and into said recess for temporarily locking said locking-member in. po- 'sition.

*3. In a collapsible core for the manufacture of tire shoes, the combination of a series of segmental-shaped sectionsadapted to be assembled into a circular core, the ends of the sections abutting against each other and formed with inwardly-extending flanges, two..'-of said sect-ions hinged to the opposite ends of a third section, the free ends of said hinged sections separated from each other and provided with faces adapted to form a wedge-shaped space between them, a wedge-shaped key capable of being inserted in the said space completing the core, and a curved locking member arranged to be inserted within the core by being laterally shifted to. position, the interengagement between the outer face of the locking member and the inner faces of the core members when said locking member is shifted transversely serving to hold said core members in their open or expanded. position. I

4. In a collapsible core for the manufacture of tire shoes, the combination 'of a series of segment-shaped sections adapted to be assembled into a circular'core, the ends of the sections, abutting against each other and formed with inwardly-extending flanges, two of said sections hinged to the opposite hinged sections separated from each other and provided with faces adapted to form a. Wedge-shaped space between them, a wedgeshapedkey capable of being inserted in the said space completing the core, a curved locking member arranged to be inserted Within the core by. being laterally shifted to position; the interengagement between the I outer faces of the looking member and the. inner faces of the other members when said i locking member is shifted transversely, serving to hold said corel members in their open expanded position, and means for holding said locking member in position.

In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses. y

GEORGE LOWELL MATHER. \Vitnesses:

C; E. HUMP-HREY, A. L. MoCLINTooK. 

